Silver Eyes are objects in the world of Kill the Past. They grant supposed immortality to those who replace one of their own eyes (consistently the left eye) with a Silver one. However, the exact powers of the Silver Eyes are unclear and have been said to include the aforementioned immortality and youth, indirect immortality through transferring to another body, and the ability to loop time. The eyes originate from Lospass Island, a breeding ground for a rare breed of hyenas that have the Silver Eyes; however, their eyes are not silver initially, and are said to turn silver through a process called "ocular silverization" when inserted into humans under specific circumstances.
The first Silver Eyes found by the Ward 24 government were originally discovered to have been implanted into Kamui Uehara. During The Silver Case, the elderly politicians kill each other over the eyes, with Uminosuke Hachisuka being the sole victor, putting both eyes into himself and becoming immortal. After this, the ward government begins the Shelter Kids Policy, with one of their goals being ocular silverization, although they are never able to reach it.
Owners
- Kamui Uehara - had a Silver Eye implanted into him on Lospass Island when he was two years old.
- Uminosuke Hachisuka - stole Kamui's eye after killing him.
- Tokio Morishima - stole Uminosuke's eye after his death, and kept it throughout Flower, Sun, and Rain. Lost it afterwards; his right eye was then replaced with a man-made Silver Eye (see below).
- Tetsugoro Kusabi - has a Silver Eye as Peter Bocchwinkur; unclear if it is kept afterwards.
- Step Sding - the clone fitted with a bomb seen in Flower, Sun, and Rain appears to have one
- Catherine - according to Suda, it has a Silver Eye in its core, although Sumio Mondo is not aware of it.
- Yotaro Osato - appears to have two Silver Eyes.
Man-made Silver Eye
In the backstory of The 25th Ward: The Silver Case, while staying in IMM Hospital, Tokio Morishima's right eye was fitted with an artificial mechanical Silver Eye. This type has other features; most notably, he uses it as a data plug to extract data into his "tape" body.
Possible Silver Eyes
There is some speculation that the God-Hand and God-Killer in killer7 are potentially related to the Silver Eyes, due to their owners having immortality and strange powers. Kevin Smith seems to have white or silver colored eyes that are said to glow in the dark, but his planned plot significance is never mentioned in the game. (Interestingly, in the flashback cutscene in the Union Hotel, his eyes are normal; this may or may not be part of his disguise.)
It appears that Mondo Zappa's left eye glows with power when he uses his silver Ulti-Mondo form. What this means in relation to the Silver Eyes of past titles is unclear.
The protagonist of Kurayami Dance has an odd-looking eye that is drawn the same way that Silver Eyes have been drawn in past illustrations. However, his special eye is in the right socket, unlike every natural Silver Eye; other scenes show two different colored eye implants, a lighter one for the left socket and a darker one for the right socket.